Integrating climate projections into State Government decisionmaking Ramona

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Integrating climate projections into State Government decision-making Ramona Dalla Pozza, Geoff Steendam, Clare Brownridge

Integrating climate projections into State Government decision-making Ramona Dalla Pozza, Geoff Steendam, Clare Brownridge and Jacqueline Th urgood Department of Environment, Land Water and Planning, Victoria

Victoria’s climate • Victoria’s climate has changed in recent decades, becoming warmer and drier.

Victoria’s climate • Victoria’s climate has changed in recent decades, becoming warmer and drier. • These changes are expected to continue in the future. • This presents a significant challenge to Victorian communities, governments, businesses and the environment. • Understanding the drivers and impacts of these changes will help us to plan and adapt. 2

Future climate projections The Victorian Government is investing in climate projections to inform decisions

Future climate projections The Victorian Government is investing in climate projections to inform decisions that support a resilient future for Victoria. 3

Bridging the gap between data and decision-making 2100 Temperature Heatwaves Knowledge brokering Extreme rainfall

Bridging the gap between data and decision-making 2100 Temperature Heatwaves Knowledge brokering Extreme rainfall Case studies 1980 2100 Rainfall Bushfire risk Vulnerability assessments Flood risk Coastal inundation Decision support tools 1980 4

Integrating climate projections into decision-making • Our challenge is to provide adequate guidance and

Integrating climate projections into decision-making • Our challenge is to provide adequate guidance and support for users to apply these future climate projections to make meaningful decisions. Victoria's future climate mapping tool • Victoria’s Climate Science Report – is an easy to understand explanation of the observed and future changes – available soon. • Developing a mapping tool to visualise the projections data – mid-2020. • But we need to do more… 5

South East Australia Climate Initiative SEACI (2006 – 2012) Victorian Climate Initiative Vic. CI

South East Australia Climate Initiative SEACI (2006 – 2012) Victorian Climate Initiative Vic. CI (2013 -2017) Victorian Water and Climate Initiative Vic. Wa. CI (2017 -2020) Outputs during program + Synthesis report late 2020

Focus of water resource research programs 1. Physical process understanding 2. Uncertainties in projections

Focus of water resource research programs 1. Physical process understanding 2. Uncertainties in projections 3. Synthesising the science regionally & for water sector 7

Application – water resources Rosters and restrictions 8

Application – water resources Rosters and restrictions 8

Observed winter rainfall in Victoria has been declining CSIRO, 2019 9

Observed winter rainfall in Victoria has been declining CSIRO, 2019 9

Declines in streamflow past 20+ years Source: DELWP 10

Declines in streamflow past 20+ years Source: DELWP 10

For more information: www. climatechange. vic. gov. au www. water. vic. gov. au climate.

For more information: www. climatechange. vic. gov. au www. water. vic. gov. au climate. science@delwp. vic. gov. au HCS. Team@delwp. vic. gov. au